Finding the Fourth Proportional to 3,658.12, 5,048.42 and 2,086.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,658.12 : 5,048.42 = 2,086.72 : x
2. Step 2: Convert to fraction form
   3,658.12/5,048.42 = 2,086.72/x
3. Step 3: Cross multiply
   3,658.12x = 5,048.42 × 2,086.72
4. Step 4: Simplify right side
   3,658.12x = 10,534,638.98
5. Step 5: Solve for x
   x = 10,534,638.98/3,658.12
6. Step 6: Final answer
   x = 2,879.80